I posted some image samples on my Lodestone blog.
http://lodestone.finalfantasyxiv.com...entry?e=161478

Its effects are most noticeable on the high contrast lines.
There are diminishing returns for higher AA settings, but it does make a difference if you are looking closely. ^^

In game when fighting or running around you probably won't notice AA differences beyond 2x or 4x. But I spent a lot of time crafting and so I do notice a difference between 8x and 16x.